The end-to-end solution for building and hosting better data apps, dashboards, and reports.
Public
Edited
Oct 3
Importers
3 stars
point
pointI
xy ? [xy.x, xy.y, mandelbrot(xy.x, xy.y)] : null
function mandelbrot(x, y) {
for (let n = 0, zr = 0, zi = 0; n < 80; ++n) {
[zr, zi] = [zr * zr - zi * zi + x, 2 * zr * zi + y];
if (zr * zr + zi * zi > 4) return n;
}
}
Plot.plot({
height: 640,
marginLeft: 44,
color: {
scheme: "bupu",
type: "symlog"
},
marks: [
Plot.rect(
diamonds,
Plot.bin({ fill: "count" }, { x: "carat", y: "price", thresholds: 100 })
),
hair({ tickFormatX: (d) => (Math.floor(d * 20) / 20).toFixed(2), tickFormatY: ",d" })
]
})
function hairK(
k,
{
tickFormat,
interval,
ariaLabel = "crosshair",
textStroke = "var(--plot-background)",
textStrokeWidth = 5,
tickFormatX = tickFormat,
tickFormatY = tickFormat,
tickFormatX2 = null, /** set if you want an opposite tick */
tickFormatY2 = null,
anchorX = "bottom",
anchorY = "left",
intervalX = interval,
intervalY = interval,
text, // an additional text function of x and y
fontVariant = "tabular-nums",
...options
} = {}
) {
const {format, utcFormat, pointer} = d3;
options = { ...options, pointerEvents: "none" };
intervalX = maybeInterval(intervalX);
intervalY = maybeInterval(intervalY);
const marks = { x: [], x2: [], y: [], y2: [], xy: [] };
if (k.includes("x")) {
marks.x.push(Plot.gridX({ ariaLabel: `${ariaLabel}-x tick`, anchor: anchorX, ...options }));
const [, textX] = Plot.axisX({
ariaLabel: `${ariaLabel}-x label`,
textStroke,
textStrokeWidth,
tickSize: 0,
fontVariant,
anchor: anchorX,
...options
});
if (textX) marks.x.push(textX);
if (tickFormatX2 != null) {
const [, textX] = Plot.axisX({
ariaLabel: `${ariaLabel}-x label2`,
textStroke,
textStrokeWidth,
tickSize: 0,
fontVariant,
anchor: anchorX === "bottom" ? "top" : "bottom",
...options
});
if (textX) marks.x2.push(textX);
}
}
if (k.includes("y")) {
marks.y.push(Plot.gridY({ ariaLabel: `${ariaLabel}-y tick`, anchor: anchorY, ...options }));
const [, textY] = Plot.axisY({
ariaLabel: `${ariaLabel}-y label`,
textStroke,
textStrokeWidth,
tickSize: 0,
fontVariant,
anchor: anchorY,
...options
});
if (textY) marks.y.push(textY);
if (tickFormatY2 != null) {
const [, textY] = Plot.axisY({
ariaLabel: `${ariaLabel}-y label2`,
textStroke,
textStrokeWidth,
tickSize: 0,
fontVariant,
anchor: anchorY === "left" ? "right" : "left",
...options
});
if (textY) marks.y2.push(textY);
}
}
if (text && k === "xy") {
marks.xy.push(
Plot.text([1], {
ariaLabel: `${ariaLabel}-text`,
...options,
dx: 6,
textAnchor: "start",
dy: -10,
stroke: textStroke
})
);
}
const frame = Plot.frame({ pointerEvents: "all", stroke: "none" });
return (_i, scales, _v, dimensions, context) => {
const g = context.document.createElementNS("http://www.w3.org/2000/svg", "g");
g.setAttribute("aria-label", `${ariaLabel}`);
const f = frame.render.apply(frame, [[], {}, {}, dimensions, context]);
g.append(f);
const r = context.document.createElementNS("http://www.w3.org/2000/svg", "g");
g.append(r);
let sticky = false;
f.addEventListener("click", (event) => ((sticky = !sticky), update(event)));
f.addEventListener("pointermove", update);
f.addEventListener("pointerout", function () {
if (sticky) return;
r.innerHTML = "";
context.dispatchValue(null);
});
const formatX = k.includes("x") ? formatk(tickFormatX, scales.x.type) : null;
const formatX2 = k.includes("x") ? formatk(tickFormatX2, scales.x.type) : null;
const formatY = k.includes("y") ? formatk(tickFormatY, scales.y.type) : null;
const formatY2 = k.includes("y") ? formatk(tickFormatY2, scales.y.type) : null;
function formatk(fmt, type) {
return typeof fmt === "function"
? fmt
: typeof fmt === "string"
? (type === "time" || type === "utc" ? utcFormat : format)(fmt)
: (d) => d;
}
function update(event) {
if (sticky) return;
let [px, py] = pointer(event, context.ownerSVGElement);
let x = scales.x?.invert ? scales.x.invert(px) : px;
if (intervalX)
(x = intervalX.floor(x)), (px = scales.x ? scales.x(x) : px);
let y = scales.y?.invert ? scales.y.invert(py) : py;
if (intervalY)
(y = intervalY.floor(y)), (py = scales.y ? scales.y(y) : py);
context.dispatchValue({ x, y });
r.innerHTML = "";
r.append(
...marks.x.map((m) =>
m.render.apply(m, [
[0],
scales,
{ x: [px], text: [formatX(x)] },
dimensions,
context
])
),
...marks.x2.map((m) =>
m.render.apply(m, [
[0],
scales,
{ x: [px], text: [formatX2(x)] },
dimensions,
context
])
),
...marks.y.map((mark) =>
mark.render.apply(mark, [
[0],
scales,
{ y: [py], text: [formatY(y)] },
dimensions,
context
])
),
...marks.y2.map((mark) =>
mark.render.apply(mark, [
[0],
scales,
{ y: [py], text: [formatY2(y)] },
dimensions,
context
])
), ...marks.xy.map((mark) =>
mark.render.apply(mark, [
[0],
scales,
{ x: [px], y: [py], text: [text(x, y)] },
dimensions,
context
])
)
);
}
return g;
};
}
function maybeInterval(i) {
return i == null
? i
: typeof i === "string"
? Plot.utcInterval(i)
: typeof i === "number"
? Plot.numberInterval(i)
: (() => {
throw new Error(`unsupported interval ${i}`);
})();
}
function hair(options) {
return hairK("xy", options)
}
viewof xx = Plot.plot({
height: 270,
x: { nice: true },
marks: [
Plot.lineY(aapl, { x: "Date", y: "Close" }),
hairX({ tickFormat: "%Y\n%b", stroke: "red", strokeOpacity: 1 })
]
})
function hairX(options) {
return hairK("x", options)
}
viewof yy = Plot.plot({
height: 270,
x: { nice: true },
marks: [
Plot.lineY(aapl, { x: "Date", y: "Close" }),
hairY({ tickFormat: ".0f", stroke: "red", strokeOpacity: 1 })
]
})
function hairY(options) {
return hairK("y", options)
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.